Metallic lathing



Nov. 8, 1927.

L. P.-- HAzEN METALLIC LATHING Filed Oct. 26. 1925 W m W Patented Nov. 8, 19527.,

UNITED STATES LEVI IARKER HAZEN, OF CINCINNATI, OHID.

METALLIC terrains.

Application filed October 2G, 1925.

This invention relates to metallic-lathing adapted for convenient, economic, fire-proof and other effective use in connection with the surfacing, on one or both sides, of inside walls, outside walls, floors and roof construction and, more particularly, to that type of metallic-lathing that is composed of dove* tail cross-section channels or depressions formed in sheet-metal to both strengthen and stiften it and provide interlocking and abut ting means that have recesses or chambers for the keying and bonding of the plaster or cement aggregate used as the surfacing or covering of said wall, floor and roof parts of buildings.

The invention consists in the provision of both longitudinally interlocking and abutting channeled sheet-metal strips that are of dovetail cross-section and adapted to make a dovetail anchor or spreader-key of the plastic material'used in a building-structure, and on one or both sides of the part `of the structure that is to be coated or covered with either plaster, concrete, gypsum, or like materials, as circumstances or conditions may require.

The details of structure of the speciie forms of metallic-lath now presented and devised by me will be fully hereinafter described andthen pointed out in the claims that follow. l

In the accompanying sheet of drawings* Figure l is a fragmentary perspective view of one of several forms of my dovetailchanneled metal-lath; Fig. 2,2m similar fragmentary perspective view of another ofthe said several forms; Fig. 3, a perspective view showing a series of closely-jointed metallath units or strips of `both said forms seen in Figs. l and 2; Fig. 4, an end elevation of a series of dovetail cross-section metal-lath units seen in Fig. 2; Fig. 5, a cross-section of an abutting series of dovetail cross-section metal-lath strips seen in Fig. 1; Fig. G, ay sectional view similar to Fig. 5; andFig. 7, a miniature end view of a roll or coil of metal lath-units made and connected in series as displayed in Fig. 5.

The body-portion of the metal lath unit or strip herein is best shown, taken by itself, in Fig. 2 and is designated by the letter A, which letter is carried constant throughout all the views in the sheet of drawings. This body-portion comprises a plane,`f1at mainmember orsingle unit strip `that has inwardly-bent longitudinal edges a, a, at an Serial No. 65,021.

acute angle to complete a dovetail crosssection of the narrow metal strip that imparts rigidity and strength, as well as to provide chambers ork recesses for anchoring in what is commonly known as key-spread ing of the plaster or other plastic-surfacing for walls and ceilings of building-structures. Holes a are preferably punched at intervals apart in the said main-member of the lathunit for convenience in setting and driving the fastening-nails B into place in the timber C, the latter being either a studding, joist, rafter, or. other mounting-support for the lath-unit and the coating whatever the plastic may be. or its purpose, whether wall,

p ceiling, or fioor to be covered. This bodyportion forms the nucleus about which the improvements herein evolve,` and I will now proceed to describe briefly the details of the several correlated structuresthat are em-V ployed in obtaining the bestresults in conncction with wall, ceiling and floor partsV of buildings. l

In Fig. 1 is shown a. lath-unit that is made up essentially ofthe said dovetail body-portion A that has lateral obtuse-angled extensions D, along both` of its opposite longitudinal edges. These extensions D are made up of base-portions 8 formed integral with the lower edges of the inwardly-turned members a, a, of the body-portion A, and outwardly-dared vertical flanges 9, the degree of flare practically corresponding to that of the said members a, a, and thereby providing a channel along the opposite edges of the said dovetail body-portion A. In Fig. 3 is shown how the structure seen in Fig. l is secured by means of said nails B to the supporting-timber C, such nails being insert ed through the holes a in the dovetail bodyportion A, and thence into the upper narrow edge or side-faceof the said timber C. In this view (Fig. 3) a pair of said lath-units of Fig. l is compactly or closely jointed in parallelwith one of the dovetail members A seen in Fig. 2, with the inwardly-turned members a. a, of said member A` resting or seated in the angle of the lateral obtuse-angled extensions D, whereby the upper corner edges of the series of said jointed body-portions A approach closely together to maintain a continuous surface for the adhesion of a plastic adapted for fioor work in particular, that needs no key-spreading thereof to anchor it in supported place as would be necessary in wall and ceiling uses.

ino

In Fig. 4t is shown an interlocking structure composed of reversely-arranged dovetail duly-corresponding body-portions or `metal luth-members A, the inwardlyturned edges or members a, a, of each member A.

` building-structure for the surface-coating of plaster or other desired plastic material that is ysuited .to .the purpose of the user Vin the formation of the said building-structure. In this view is shown the plastic .as vbeing designated by the letter E in the upper course* only, V,but `it will be understood ,that the plastic can vbe used on both sides and including the lower course also.

In Fig. 5 is shown .what may be termed an abutting pair of a modified form of jointed Yseries of ymetal lath-units Comprising my invention herein, each lath-.unit having in common Awith the other a dovetail body-portion A, a counterpartv of F ig. 2, and with lateral right-angled extensions D alongv both of its longitudinal edges, somewhat similar i to the obtuse-angled extensions l) in Fig. 3

but .with the upper flange-portion (Z a-trifle higher along yone edge than the upright flange-portion e along the other edge thereof, so that, when assembled, the shallow iianges e abut each other and the 'higher fianges'd abut each other to correspond. VAllowance is thus lmade in the dovetail-form channel E', which is'the result obtained when the shallow abutting-members e are brought together in placing the metal lath-.units of this modied structure (Fig. 5) for thereception of the plastic E. The said yplastic Ibecomes keyed or anchored in the said channel E', the same as in the other dovetaiil-form channels of the Abody-,portion A of each llath-unit and, also, in the dovetail-form of channel F that will result when the higher abutting-meinbers d are brought together' in placing lat-hs of this modified structure (Fig. 5) in position for use. Besidesiy use a narrow vtransverse metal strip G in this modified form (Fig. 5) at suitable intervals apart to more stably unite or bind the series of abuttin.0V metal lath-units, such strips being each conveniently made up of a number ofshort lengths that are wrapped or coiled at Vtheir meeting ends, as shown at g and with such resultant coil-joints turned downwardlyinto the dovetail-form channels E wherein the shallow abutting-members c are present and ordinarily serve to support the coil-joint. rlhe said strips G are further spot-welded at g to each body-portion A in the series of lath-units in this structure (Fig.4 5) for adding stability thereto.

In Fig. 7 is shown how the `coupled-up Structure Shown in fF-a .5 can .be .Iliade-into extended lengths and coiled or rolled into round bundles or .rolls for convenience in handling and shipping.

ln Fig. 6 is shown still another form, which is practically a modilied replica or duplicate of that shown in Fig. 5, but in which the lateral right angled extensions D have shallow flange-,portions e along one longitudinal edge and a downwardly-turned right-angled extension 7 along its other right-angled longitudinal edge so that, in assembling, the extension f laps upon the abutting edges e and f within the dovetailform channels E, lthe result of bringing together ithe said abutting edges e and f when placing ,the metal lath-units vin series for the .anchored-reception of the plastic. The lapped-form of joint in this view (Fig. 6)

serves to strengthen the same and obviateA spreading of the lath-units away from each otlicrtransversely, thus avoiding cracks in the plastic after setting, which is highly efficient and important yin all plastic `parts of building-structures.

ln summing up many of the advantages acquired Iin the use of the sheet-metal lathunits -rherein l here state that there .is no waste, as the fcuttings-7 can be used on smaller surfaces .and secured to supports very readily by means of nails or the like; thematerial used is readily obtained and of a cheap and permanent, iireproof nature; that said material takes 4the place of wood which is .a .very decided factor in the conservancy of lumber and of the forests; Ithat the met-al laths are unbreakable and, when packed in the vusual size bundles .of one-hundred (10,0), are easy to handle; that said metal' `laths, in shipping, will ,carry a loW freight rate and with no insurance being necessary; that when -the said metal laths are made up in the roll-form seen in Fie'. 7 they may be quickly applied to fiat surfaces and `thereby a decided saving of labor and time accomplished; that the metal lath herein is fire-proof and its use :in structures serves its purpose in reducing rates of insurance throughout the structure, and otherwise becomes af permanent Ere-proof, verminproo-f and non-shrinkable'part ofthe building-structure, and- "adds greatly to 'its strength and rpermanency; andl the laths herein, being machine-made, can be very economically andV expeditiously manufactured in large or small quantities as desired.

It ywill be here observed that a saving of plastic material is .effected whenever no 'keys or anchors are necessary in the usez ofniny metal lath-units herein, which is always an important .feature in the use of any material that iscostly and should not in any event be wasted.

ln Fig. 1 is shown a pair of intersecting slits H made inthe` sheet-metal for upsetting :or depressing inwardly by means of a llU hammer or the like and adapted to provide a pocket or recess for anchoring or keying a quantity of the plastic-covering of the metal lat-h, especially on upright Walls and overhead ceilings. In Fig. 2, however, is shown another form of key or anchor recess that is provided or made possible by slitting the metal in an associated pair of angular- U-shape cuts that result in a pair of tongues I, I, which are adapted to be depressed by means ot' a hammer or other suitable implement and thereby accommodate a supply or entrance of a quantity of the plastic material in surface coating or covering the Walls or ceilings of a building-structure.

l. A metal-lath structure comprising a single sheet-metal hollow unit or body-portion oi? dovetail cross-section and having an L-shape lateral extension formation along its opposite longitudinal edges.

2. A metal-latch structure comprising a single sheet-metal hollow unit or body-por tion of dovetail cross-section having L-shape lateral extension formations along both of its longitudinal. edges and adapted to longitudinally abut similar formations in the as semhling of a series oif like dovetail metal laths for the reception of a surface coating or covering and the anchoring of plastic material on one or both sides of the series.

A metal-lath structure comprising a single sheet-metal hollow unit or body-portion. of dovetail cross-section having L-shape lateral extension formations along its oppo site longitudinal edges that are of several heights and adapted to abut in parallel use with like vunits Afor providing longitudinal auxiliary channels of dovetail cross-section between adjacent dovetail body-portions and transverse metal strips jointed together in coil or Wrapped ends and further spot-weld ed or likewise secured tothe plane member of each or" said body-portions for connect Ving or binding the series of metal laths in LEVI PARKER HAZEN 

